SEDIMENT CHEMISTRY--Analytical standards In Reply Refer To: March 6, 1989 WGS-Mail Stop 412 OFFICE OF WATER QUALITY TECHNICAL MEMORANDUM NO. 89.04 Subject: SEDIMENT CHEMISTRY--Analytical standards The attached Administrative Report by Arthur J. Horowitz, "The Use of Reference Materials for Projects Using Solid Phase Chemical Data," calls attention to the use of standard reference materials to assure the accuracy of analytical data on solid-phase materials. Anyone planning to use analytical data on solid-phase materials should assure himself that the analytical laboratory has used reference materials similar to his own samples. The attached report provides information on sources of such materials. Additional information, if desired, can be obtained from the author in the Georgia District Office. David A. Rickert Chief, Office of Water Quality Attachment This memorandum does not supersede any previous Office of Water Quality memorandum. Key words: Solid Phase, Analytical Standards, Quality Assurance Distribution: w/attachment S, PO, FO w/o attachment A, B